Sparking igniter for explosive-engines.



Patented Apr. 23, I90].

- A. BATH. SPARKING IGNITER FOR EXPLOSIYE ENGINES.

(Application filed Fab. 17, 1900.

(No Model.)

shown.

UNITED STATES PATENT ()FFIC ABRAHAM BATH, OF NEW YORK, N.

Y., ASSIGNOR TO SAFETY THREE- WHEEL VEHICLE COMPANY, OF SAME PLACE.

SPARKING IGNITER FOR EX PLOSIVE-ENGINES.

SPECIFICATION forming part Of Letters Patent N 0. 672,875, dated April 23, 1901.

Application filed February 17, 1900. Serial No. 5 ,623. (No model.)

To all whom it may concern.-

Be it known that I, ABRAHAM BATH, a subject of the Queen of Great Britain, (but having declared myintention of becoming a citizen of the United States,) residing at New York, in the county and State of New York, have invented a new and useful Sparking Device for Motors, of which the following is a specification.

My invention relates to means for igniting explosive charges in motors, and especially to that class of igniters where electricity is used as the igniting agent, and has for its objects, first, to provide a simple and efficient device for this purpose in which all danger of short-circuiting will be eliminated; second, to provide a device which will require a Very small current or potential, and, third, to provide a device which will have stability.

I accomplish the objects of my invention by the mechanism illustrated in the accompanying drawings, in which Figure l is a central longitudinal section of my improved sparking device, showing the same applied to the cylinder of a motor; and Fig. 2 is a view of the inner end thereof.

In the accompanying drawings like parts are indicated by the same numerals of reference in each of the views, and in the practice of my invention I provide a terminal consisting of a short cylinder 5, which is tubular in form and is provided exteriorly with a collar 6 and with a screw-threaded portion 7, adapted to engage a tapped aperture in the cylinder of the motor, a section of which is shown at 8, and the collar 6 being flat on the inner side makes close contact with the outer surface of the cylinder of the motor, as clearly shown in Fig. 1. The inner end of the cylinder 5 is provided with an inwardly-directed flange 9, which is beveled exteriorly, and the inner end of the cylinder is also provided with a flat portion 10. I also provide a core 11,0f insulating material,preferably of porcelain, which is provided with a collar 12, and the core 11 is mounted within the cylinder 5, with the collar 12 against the flange 9, while a nut 13, engaging an interior screw-threaded portion in the outer end of said cylinder, serves to hold the core in place, as clearly On the inner end of the core 11 I mount the other terminal or accumulator 14, which is thimble-shaped in form and consists of a top 15, which is fiat both exteriorly and interiorly, and a flange 16, the outer surface of which is at substantially right angles to the top 15; but the interior surface is preferably inclined toward the center of the top, so

- that the said flange is thicker adjacent to the top than. at the edge, and the edge of the flange 16 is serrated to form a plurality of teeth 17. A bolt 18, passing through the center of the accumulator or cap 14 and through a central longitudinal aperture in the core 11, holds the said cap in place with the aid of a nut 19, and electrical connection is made with the bolt 18, as shown at 20, and the circuit is completed by making'electrical connection with any point of the cylinder 8, as shown at 21.

The accumulator or cap 14 is preferably provided with two or more apertures 22 to provide means for the escape of any oil which might accumulate therein and to provide ready means of cleaning the interior thereof.

It will be observed that I have shown the accumulator or cap 14 as having considerable thickness of metal. This not only makes the cap more durable, but also serves to accumulate the electricity, so that a circuit having a very low potential will cause a spark at the desired moment. I have found in actual practice that I can operate my sparking device successfully on a secondary current of three-fourths of an ampere. This is a very important feature, especially where the device is used in a motor to drive a vehicle.

The entire construction is such, it will be observed, that the only points of the cap or accumulator 14 that approach any part-of the motor or other terminal are the teeth 17, so that there is no danger whatever of shortcircuiting, and owing to the core 11 extending into the cap 14 without being diminished in diameter and, as aforesaid, owing to the thickness of metal in the cap 14 none of the teeth 17 will be thrown into contact with the surface 10 of the other terminal 5 by a jar of the vehicle or from any other cause. Further, as the outer surface of the flange 16 is at right angles to the surface 10 the dielectric space will always remain constant owing to the thickness of cap 14, and as there are a large number of teeth 17, while the other terminal is a flat surface, there will be usually several sparks discharged simultaneously,so that the ignition of the explosive material within the motor cannot fail to take place.

It is evident that many changes in construction can be made Without departing from the spirit of my invention and that the core 11 can easily be made adjustable longitudinally by placing Washers between the flange 9 and collar 12, if so desired, and I reserve the right to make all such changes.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. In a sparking device for motors, a core, a terminal mounted on the inner end thereof and having a portion thereof extending back over the side of said core, a bolt passing through said core and securing said terminal thereto, a second terminal surrounding said core intermediate of the ends thereof, and suitable electrical connections with said terminals.

2. A sparking device for motors, comprising a core, a thimble-shaped terminal mounted on the inner end thereof having aserrated edge, a bolt passing through said core and securing said terminal thereto, a second terminal surrounding said core, intermediate of the ends thereof, and suitable electrical connections with said terminals, as and for the purpose set forth.

3. In a sparking device for motors, a terminal having a fiat top and a flange projecting at right angles thereto and provided at the edge with a plurality of teeth, in combination with a second terminal having a flat surface opposed to said teeth, for the purpose set forth.

4. In a sparking device for motors, a core 11, a terminal mounted on the inner end thereof, and consisting of a flat top 15, and flange 16 with teeth 17, the same forming one terminal, and a second terminal surrounding said core and provided with a flat surface opposed to said teeth, substantially as and for the purpose set forth.

5. In a sparking device for motors, a core 11, having a collar 12, a cap, or t-himbleshaped terminal 14, mounted on the inner end of said core, and consisting of a flat top 15, and flange 16 projecting at right angles thereto, and provided at the edge With teeth 17, a bolt 18 passing through said core, and securing said cap thereto, electrical connection being made with said bolt, and a second terminal surrounding said core, and provided with a flat surface opposed to said teeth, substantially as and for the purpose set forth.

6. The herein-described sparking device for motors, comprising a cylinder 5, having a collar 6, an inwardly-directed flange 9, a core 11, mounted Within said cylinder and projecting beyond said flange, the same being provided with a collar 12 adapted to engage said flange, and a nut to hold the same in position, a second terminal mounted on the end of said core, the same being a cap having a flat top 15, and flange 16, with teeth 17, a bolt 18 passing through said core and securing said cap thereto, the cylinder, or terminal 5 having a flat surface 10 opposed to said teeth 17, and electrical connections With the bolt 18, and with a portion of the motor, substantially as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

ABRAHAM BATH.

Witnesses:

GEORGE M. HOWELL, JAMES E. BLOOMER. 

